Wellscreen
Well screen is available in uPVC, HDPE and Steel. PVC liners are available from a nominal diameter of 19 mm up to 200 mm.
PVC Wellscreen, Well Liners Sizes
PVC liners are available from a nominal diameter of 19 mm up to 200 mm.The well liners ND23 mm size and upwards are suitable for use in water abstraction projects and are approved under the Water Regulations Approval Scheme (WRAS), Approval Number: 2309549.
The testing procedure confirms that the well screens and casings are suitable for contact with wholesome water for domestic purposes having met the requirements of BS6920 -1:2000 and/or 2014 'Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on
the quality of the water.
The approval is valid until September 2028
Various machined slot sizes to allow for ground conditions are available. The pipe is stocked in lengths of 1 m and 3 m, with each length being male/female threaded so that installations can be suited to specific site conditions, in 50 mm normal diameter HDPE and uPVC, we also stock 2 m section of plain and slotted.
For specification of these materials the following criteria should be stated:
"uPVC casing and wellscreens shall be supplied by an ISO9001 approved manufacturing company, the pipe shall be male/female threaded with machined slots on the wellscreen.
The slots shall be horizontal to the pipe length to prevent slot compressions.
Our UPVC (unplasticised polyvinyl chloride) liners are PFAS (per and polyfluorinated alkyl substances) free.
| ND | MOD | MOSD | MID |
|---|---|---|---|
| 19* | 26.5 | 32 | 280 m |
| 23 | 33.5 | 33.5 | 450 m |
| 35 | 42 | 46 | 660 m |
| 52 | 60 | 60 | 320 m |
| 80 | 88 | 95 | 90 m |
| 103 | 113 | 120 | 90 m |
| 115 | 125 | 130 | 65 m |
| 125 | 140 | 148 | 105 m |
| 155 | 165 | 172 | 41 m |
| 180 | 200 | 210 | 44 m |
*Not water byelaws approved product
Key
- ND = Nominal Diameter, internal (mm)
- MOD = Maximum Outside Diameter (mm)
- MOSD = Maximum Over Socket Diameter (mm)
- MID = Maximum Installation Depth
High Density Polyethylene Liners
Stuart Well Services supplies a range of well-linings for site investigations, dewatering wells, leachate abstraction wells, water abstraction wells, soakaways and gas abstraction wells.
These are manufactured to meet the requirements of ISO9001: 1994. Pipes are male-female threaded in lengths of 1 and 3 metres.
Our HDPE wellscreen is approved under the Water Regulations Approval Scheme (WRAS) having met the requirements of BS6920-1:2000 and/or 2014 ‘Suitability of non-metallic products for use in contact with water intended for human consumption with regard to their effect on the quality of the water.’
WRAS approval number: 2207525
| Outside Diameter (mm) | Inside Diameter (mm) |
|---|---|
| 40 | 28 |
| 63 | 51.4 |
| 90 | 73.6 |
| 110 | 97.4 |
| 160 | 141.8 |
Other dimensions and wall thickness are available on request up to 630 mm diameter.
Slot sizes are 1 mm standard, other sizes available on request .
Wire Wrapped Wellscreen
Using a wire wedge wellscreen has specific advantages over other steel screens and allows high flows of sand-free water into the well because of:
- A large open area
- Close slot tolerance to control fines
- Efficient well yielding
- No plugging
Wellscreens are made in a range of stainless steels 304 or 316 and other weldable metals in a wide range of diameters and slot sizes from 0.25 mm to 4 mm.
Screens and casings are manufactured to customer requirements with threaded or flange connectors, lead time is up to 10 weeks.
Available to order as not stocked
Bridge Slotted Wellscreen
Bridge slot screens are formed by punching openings into a flat sheet that is subsequently rolled into a tube
and welded.
The openings are arranged in staggered rows to maintain the screen's strength.
Advantages of this screen are high strength through resistance to twisting, compressive and tensile forces.
- Slot sizes from 1.0 mm to 3 mm
- Wall thickness 6 mm
- Diameters from 115 mm to 508 mm
- Open area 6% to 23%
Available to order as not stocked
Simple Slotted Screen
These are formed from perforated plate that is rolled and welded. The holes are rectangular and arranged in rows with the longer side of the slot in alignment with the pipe axis.
- Slot sizes from 3 mm to 6 mm
- Wall thickness 3 mm to 6 mm
- Open area 14% to 23%
Available to order as not stocked